Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint/idempotentHint/destructiveHint=false, so the safety profile is covered. The description goes beyond that by disclosing the actual return content (totals for videos, views, storage; top videos; newest uploads; daily series), which is valuable since there is no output schema. It does not state scope (account-wide vs. per-video) explicitly.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

A single front-loaded sentence with no filler; the enumerated outputs are the highest-value information and come first. Every clause earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no output schema, the description correctly carries the burden of describing returns, and it does so comprehensively. It is nearly complete for a one-optional-parameter read tool; the only gap is not clarifying the account-level scope or the relationship to get_earnings.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% — the days parameter has its own description with default and bounds — so the baseline is 3. The description's 'last N days' corroborates that the window applies to the daily views series but adds no syntax or constraint detail beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description names a specific verb-equivalent ('how the user's videos are doing') and enumerates exactly what is returned: totals, most viewed, newest uploads, and a daily views series. That is far more specific than a tautology like 'gets analytics'. It stops short of distinguishing itself from the sibling get_earnings, which is the natural ambiguity here.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

There is no statement of when to use this tool versus alternatives such as get_earnings or get_video. Usage is only weakly implied by 'the user's videos are doing'. No prerequisites or exclusions are given.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.